CORBA技术在构建电信综合网管系统中的应用

为适应电信运营商网络集中管理和维护的需求,网管系统必须实现集中监控、集中维护和集中管理.CORBA是OMG(对象管理组织)提出的一种面向对象的分布式计算体系结构,因为具有良好的分布式处理性能在电信综合网管领域可以得到更积极的应用.     

网络管理方式评估的一种定量方法

提出一种分析框架 ,运用这种框架建立集中式网络管理方式和分布式网络管理方式的模型 ,并且进行定量比较。根据网络监测和数据查找这两种应用下的性能和可量测性来评估每一种方案 ,得到的结果与直观的结论相符 :分布式管理与集中式管理相比有很多的优点 ,但是一种单一的管理方式并不是对于所有类型的网络总是最佳的 ,我们在具体应用时应该仔细地评估 ,然后选择最适合这种应用的网络管理方式。对于有线电视网 ,也可依据这一原则来选择合适的网络管理方式     

云监控系统在网络集中管理中的应用研究

分析了集中化网络运维发展趋势,阐述了集中网络监控、集中投诉处理、集中性能分析的三集中趋势下网络运维面临的困难,提出利用最前沿的虚拟化三层架构实现集中化网络运维云监控解决方案,打造移动集中化网络运维云监控中心;同时,基于集中化网络运维云监控支撑系统构建新型的网络运维云管理模式,打造网络运维集中化趋势下的技术力量及信息的共享资源池,最终实现在技术、信息、人才共享基础之上的三集中网络运维管理体系,实现网络运维模式的跨越式转型发展。     

基于网络隔离与安全数据交换的发电集团双网体系研究与设计

集团型发电企业如何面向互联网服务,同时确保电力生产管理和信息网络的安全稳定,是电力企业普遍关注的问题.通过网络隔离和安全数据交换等技术设计了集团型发电企业双网体系结构.在保障网络安全隔离的基础上,引入私有协议交互技术,满足发电企业日益强劲的互联网业务发展需求.提出了逻辑强隔离的总体技术路线以及信息内外网构建、应用部署、典型应用场景信息交换的设计方案;此外,为了实现隔离后的集中监控和统一防护,提出了部署统一监测、统一防病毒、统一终端管理、统一认证系统的设计方案.     

基于多移动代理的网络性能管理系统

基于移动代理的网络性能管理,利用移动代理的移动性、智能性、灵活性和强大的扩展能力,通过对整个网络进行本地和全局的性能监控和性能数据采集,提供实时数据采集、分析和可视化工具,最终为管理员完成可视化的性能报告。能够对网络实施高效、实时和准确的性能管理,而且移动代理的平台无关性又可方便地实现跨平台的网络管理,在复杂网络的管理方面有着极大的优势。根据多移动代理的设计模式,借助于UML建模工具构建了一个性能管理系统,清晰地描述了该系统的静态和动态结构,克服了传统的集中式网络性能管理的诸多缺点。     

基于SMIoT的软件定义移动自组织物联网组网机制研究

文章充分结合SDN集中管控、MANET分布灵活和IoT智能感知的优势,采用SDN+MANET+IoT的思路实现异构网络融合组网,满足智能巡检的需求。利用可编程性高的树莓派智能小车作为IoT硬件平台,并在此基础上搭建分布式MANET网络,实现智能小车集群的自组织组网。同时,为实现智能巡检和相互协作,将OVS交换机移植到树莓派平台,利用扩展的OpenFlow协议,对分布式智能小车集群实施基于SDN技术的集中管控,统一管理集群的物理感知能力、移动监控能力和数据转发能力,进而搭建SMIoT。     

基于单片机的农业大棚智能监控网络系统设计

近年来,温室大棚技术展现出巨大经济潜力,自动化的大棚监控系统也显得尤为重要,然而目前市场上所售的农业大棚监控系统存在两点不足:设备自动化程度较低、造价高昂。文章针对上述情况,设计了一种新型的农业大棚监控系统,采用集散控制系统,下位机多点分布采集和控制,上位机集中处理数据产生决策控制信息,主从机之间采用无线网络通信,实现环境集中控制、数据实时上传网络、用户在线查看等功能。     

分布式应用安全策略集中化管理实现方法

随着通信网络建设规模的加大,分布式应用系统关联程度也日益加深。如何通过安全策略管理,提高系统安全整体管理能力是信息安全建设中的重要任务之一。本文提出了一种分布式安全策略集中化管理的实现方法,从体系框架、系统架构、实施方法等方面进行了详细的阐述。将原本分散在各领域的网络和信息安全策略进行集中化管理,进一步发挥集中化管理效率的优势,满足当前分布式应用环境对信息安全整体性、协同性的需求。     

信息网络运维监控系统的应用

随着油田的信息网络及应用系统建设的发展,越来越多的业务系统需要依托于信息技术环境进行日常办公管理和业务管理。在简要阐述信息网络运维监控系统关键技术的基础上,进行网络性能、网络架构和网络安全的监控管理等应用,通过系统实现节点状态、活动告警、最近事件等信息的及时快速提取,使网络管理人员能够及时监测、发现网络中存在的问题,提高运维工作效率,辅助实现信息网络的自动化管理。     

Stateful firewall‐enabled software‐defined network with distributed controllers: A network performance study

SummarySoftware‐defined network (SDN) is constructed by decoupling the control and data plane from the forwarding devices. The control plane operations are managed by centralized or distributed controllers, and the data plane operation is managed by respective forwarding devices. SDN provides an easy and efficient management solutions for software‐programmed consolidated middlebox in virtual machines. Additionally, SDN with centralized controller faces complications like scalability, network bottle neck, and single point failure. In this study, a stateful inspection firewall acts as a middlebox in distributed SDN‐controlled network. The controller is programmed with a failure detection and recovery mechanism to provide reliability and redundancy and enhance the overall performance of the network. The objective of stateful firewall on SDN architecture is to secure the network by monitoring the current connections and maintain its state information until the connection is active. In this paper, the performance of firewall‐enabled SDN with centralized and distributed controllers are measured, compared, and analyzed. The experiments are done using POX controller, and the results are verified by Mininet network emulation tool. The results show that the stateful firewall‐enabled SDN with distributed controller network improves the security, reliability, availability, and overall performance of the network. In the proposed SDN, average network throughput is improved by 43%, average network delay is reduced by 4%, average channel utilization is increased by 40%, average network overhead is reduced by 26%, and average network response time is reduced by 23%.     

A distributed media access protocol for packet radio networks and performance analysis. Part 1: Network capacity

A distributed time-slot assignment protocol is developed for a mobile multi-hop broadcast packet radio network, using time division multiple access channel access and virtual circuit switching. The protocol eliminates the single point failure mode of centralized network management and the delays of centralized processing. It is applicable to the user-to-user communications functions of such systems as the U. S. Army's enhanced position location and reporting system (EPLRS). The important functions of the distributed protocol, including time-slot assignment, virtual circuit set-up, and network synthesis, are identified, and implementing algorithms are presented and verified. The performance analysis of the protocol is divided into two parts. In this paper, Part 1 of the performance analysis, the capacity of a network using this protocol is studied and a tool is developed to design the network capacity by trading off among the network area, the transmission range, and the number of packet radio units. Since these results are not in closed form, numerical results provide insight into these parameters. In Part 2 the network set-up time and network data rate are analysed and a hierarchical architecture for the distributed protocol is proposed and analysed.     

宽带网络监控技术性能优化的研究与实践

叙述了网络监控系统的实现原理,分析了宽带网络环境网络监控所面临的问题。详细阐述了宽带网络监控技术性能优化的方案和测试结果,指出在百兆网络下,发掘应用程序和数据获取软件结构间的关系将显著提高系统性能;在吉比特网络下提出了CCDP结构,以合理利用现有的计算资源处理快速连接和海量数据。最后文中指出应该基于新出现的网络处理器等先进硬件技术,结合分布式处理和并行计算等传统技术来实现更高速率下的网络监控。     

A model and evaluation of distributed network management approaches

This paper develops an analytical framework to model and compare centralized and distributed approaches for network management. Each scheme is evaluated in terms of performance and scalability for two applications, network monitoring, and data searching. The results support the intuitive argument that distributed approaches can have considerable advantages over traditional centralized network management, but a single approach may not be best for all types of applications. Instead, the most appropriate approach for a specific application should be selected after a careful evaluation. The modeling framework presented is intended to quantify the tradeoffs between different approaches to lend a basis for the selection decision     

基于MCGS的上位机监控系统设计与实现

针对易燃易爆介质生产和存放安全性要求,提出了基于通用监控系统的上位机监控系统解决方案,下位机采用S7-200系列可编程控制器,通过PROFIBUS网络技术,实现了采集数据的集中管理和实时监控。详述了系统组态、数据库设计、图形界面的开发。系统提供参数的实时和历史曲线,显示报警窗口,自动生成数据报表,监测数据通过动画界面实时显示,完成实时系统与信息系统的集成。实际运行证明,系统性能稳定,可靠性及过程自动化控制效率得到了显著提高,达到了设计目标。     

Study of the Improvement on Network Management Performance with Mobile Agent

1　IntroductionWiththerapiddevelopmentofInternet,thenetworkisbecominglargerandmorecomplex ,whichcallsformoresophisticatednetworkmanage mentstrategiestobeadoptedinordertoguaranteeadequatelevelsofperformance .Confrontedwiththepresentstatusofnetworkmanagement,manyschol arsmakegreateffortstoinventnewapproachesforthepurposeofimprovingtheperformanceofnet workmanagement.MobileAgenttechnologiesandtheirapplicationtonetworkmanagementaread vancedunderthisbackground .Althoughalotofworkhasstilltobedone ,t…     

基于移动代理的分布式网络管理研究

随着网络的迅猛发展,管理网技术的相关研究也越来越得到广泛重视,传统的集中式管理方法在可扩展性、可靠性、灵活性方面存在一定的不足。基于移动代理的分布式网络管理方案可以很好地解决这些问题。网管站派遣移动代理到各被管节点上去收集数据和执行网管操作,这样可以分散网络管理站的工作量和降低网络的流量,并提升网络管理系统的主动性。     

Human perception-based distributed architecture for scalable video conferencing services: theoretical models and performance

This research work proposes a human perception-based distributed architecture for the multiparty video conferencing services. The new architecture can effectively reduce the unnecessary traffic of the multilayer video streams on the overlay network. Rich theoretical models of the three different architectures: the proposed perception-based distributed architecture, the conventional centralized architecture, and perception-based centralized architecture have been constructed by using queuing theory to reflect the traffic generated, transmitted, and processed by the three architectures. The performance has been considered in different aspects from the total waiting time to the required service rates. Together, the modeling tools, the analysis, and the numerical results help to answer the common concern about advantages and disadvantages of the centralized and distributed architectures. Overall, the proposed human perception-based distributed architecture can maintain a smaller total waiting time with a much smaller requirement of service rate in comparison with the conventional centralized architecture and perception-based centralized architecture.     

网络管理的非集中式方法

网络管理系统存在三种基本结构;,集中式,层次式和分布式,信息网络系统正朝着日益复杂化和分布化的方向发展。集中式网络管理方法已难以满足现代大型通信网络的有效管理。本文讨论了目前最重要的几种非集中式网络管理应用系统,通过比较指出了各系统的瘃及展望。     

Research on distributed mobile management of satellite network based on software define network

Distributed mobility management (DMM) was an effective method to solve the mobile address handover.Therefore,it was considered to be a technology that can be applied to satellite network mobility management.A distributed mobile management scheme which based on software definition network (SDN) was proposed to solve the traffic redirection problem in satellite network.Different from the traditional DMM application scenario which was network-based or terminal-based,the SDN-DMM scheme implements location management and address handover in SDN controllers.Therefore,SDN-based satellite network distributed mobile management scheme can realize packet forwarding path optimization compared with traditional scheme,and it shows significant advantages in managementcost and traffic management.     

支持协作多点技术的网络架构的研究

协作多点(coordinated multi-point,CoMP)技术因能有效改善小区边缘用户性能,提高系统吞吐量,引起了业界的广泛关注和研究。CoMP的研究要基于一定的网络架构,目前已有的中心式和分布式网络架构存在回程容量大、CoMP时延高、复杂度高等问题。本文提出了改进型分布式网络架构,在传统分布式网络架构的基础上增加了集中控制的逻辑实体,能有效简化CoMP流程,减少CoMP时延以及实现复杂度。